Efficient red, green, blue and white organic light-emitting diodes with same exciplex host
| Autor: | Chih-Wei Huang, Hsin-Hua Chang, Nien-Po Chen, Chung-Tsung Hsieh, Sung-En Lin, Szu-Wei Wu, Chih-Hao Chang |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Biphenyl
biology Chemistry business.industry Band gap General Engineering General Physics and Astronomy 02 engineering and technology Electroluminescence 010402 general chemistry 021001 nanoscience & nanotechnology Excimer biology.organism_classification Photochemistry 01 natural sciences Electron transport chain 0104 chemical sciences chemistry.chemical_compound OLED Optoelectronics Tetra 0210 nano-technology business Diode |
| Zdroj: | Japanese Journal of Applied Physics. 55:03CD02 |
| ISSN: | 1347-4065 0021-4922 |
| Popis: | Recently, exciplex had drawn attention because of its potential for efficient electroluminescence or for use as a host in organic light-emitting diodes (OLEDs). In this study, four kinds of hole transport material/electron transport material combinations were examined to verify the formation of exciplex and the corresponding energy bandgaps. We successfully demonstrated that the combination of tris(4-carbazoyl-9-ylphenyl)amine (TCTA) and 3,5,3′,5′-tetra(m-pyrid-3-yl)phenyl[1,1′]biphenyl (BP4mPy) could form a stable exciplex emission with an adequate energy gap. Using exciplex as a host in red, green, and blue phosphorescent OLEDs with an identical trilayer architecture enabled effective energy transfer from exciplex to emitters, achieving corresponding efficiencies of 8.8, 14.1, and 15.8%. A maximum efficiency of 11.3% and stable emission was obtained in white OLEDs. |
| Databáze: | OpenAIRE |
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